* {
    margin: 0;
    padding: 0;
}

body {
    background: black;
    color: #666;
    text-align: center;
}

audio {
    width: 450px;
    margin: 30px 0;
}

.container {
    height: 420px;
    overflow: hidden;
    /* border: 2px solid #fff; */
}

.container ul {
    /* border: 2px solid #fff; */
    transition: linear .6s;
    list-style: none;
}

.container li {
    height: 30px;
    line-height: 30px;
    transition: linear .6s;
}

.container li.active {
    color: #fff;
    transform: scale(1.3);
}